Sequences vs Series

Find S_n for the given series:
a₁=22
d=-8
n=21

• 1911

• -1449

• -2436

• -1218

What is the sum of the first 10 terms for the following geometric series:
2-6+18-54+...

• 59048

• -29524

• 524288

• 3069

Find the sum if possible

• 16

• 48

• 36

• not possible

Find the sum for the following series. 

• 44

• -162

• -682

• 324

Which recursive formula best describes the following sequence:
3, 8, 13, 18, 23...

• a_n = (3)^n-1 ; a₁ =5

• a_n = (5)^n-1 ; a₁ =3

• a_n = a_n-1+3 ; a₁ =5

• a_n = a_n-1+5 ; a₁ =3

The next term of the sequence 2,4,8,16 is

• 64

• 32

• 108

• 20

Find the next three terms: 4, 12, 36, 108, ...

• 324, 972, 2916

• 972, 2916, 8748

• 405, 1215, 3645

Find the 22nd term of the following sequence:
5, 8, 11, ...

• 14

• 68

• 63

• 71

Find the 32nd term of this sequence.
34, 37, 40, 43, ...

• 32

• 64

• 127

• 356

Find the 32nd term of this sequence.
9, 4, -1, -6, -11, ...

• 81

• -34

• -146

• -225